\begin{tabular}{|c|c|c|c|} \hline \multicolumn{3}{|c|}{ some ionic compounds } \\ \hline cation & anion & empirical formula & name of compound \\ \hline Cu+ & ClO & Cu(ClO)2 & copper (II) hypochlorite \\ \hline Sn4+ & NO2 & & \\ \hline Zn2+ & IO4 & & \\ \hline K+ & PO33 & & \\ \hline \end{tabular}